The key points in brief
Caffeine is a naturally occurring alkaloid that develops in coffee beans as a form of pest defense. A cup of filter coffee (250 ml) contains approx. 100–150 mg of caffeine, while an espresso (30 ml) contains around 60–75 mg. Per milliliter, espresso has more caffeine, but per cup, filter coffee wins.
Robusta contains about 2.0–2.7% caffeine, roughly twice as much as Arabica, which contains 1.0–1.5%. The roast level plays hardly any role, as caffeine is heat-stable and remains largely intact during roasting. The EFSA recommends a maximum of 400 mg caffeine per day for healthy adults, which corresponds to about 4–5 cups of filter coffee. If you want to control caffeine content specifically, you should focus on the choice of beans, not the roast level.
What is caffeine?
Caffeine belongs to the group of alkaloids and occurs naturally in coffee beans. Its original function in the plant is quite pragmatic. It keeps insects and pathogens away that would otherwise attack the coffee cherry during its development. For humans, it has a completely different effect.
Only those who understand the caffeine content in coffee and the factors that influence it can deliberately control their daily intake.
How much caffeine is in a cup of coffee?
The question "how much caffeine does coffee contain" cannot be answered with a single number. Serving size, bean type, and brewing method always interact with each other. As a rough guideline, a cup of filter coffee (200 ml) typically contains between 80 and 120 mg of caffeine. However, a large mug of 400 ml already doubles this amount.
What matters is that dosage, brew ratio, and contact time together determine what ends up in the cup. So if you want to know how much caffeine you are actually consuming per day, you should not only count which beverages you drink, but also consider how large the portions are.
Caffeine content comparison from
espresso to filter coffee
The most persistent misconception about coffee and caffeine content is that many people assume an espresso automatically contains more caffeine than a filter coffee. Strictly speaking, this is only true per milliliter. Per cup, however, the picture looks very different.
A single espresso (approx. 30 ml) contains around 60–75 mg of caffeine. A cup of filter coffee (250 ml) contains approx. 100–150 mg. Cappuccino and latte macchiato contain the same amount of caffeine as the espresso they are made with; the milk does not change that. Cold brew often contains slightly more caffeine than conventional filter coffee due to the longer extraction time, while French press is in a similar range.
Espresso blends with a high Robusta content deliver a particularly high coffee caffeine level; in these cases, the value can be significantly higher than that of a pure Arabica espresso. More about how Robusta proportions influence extraction and composition can be found in the article on espresso roasting.
Caffeine in coffee compared to tea, cola, and energy drinks
Coffee is not the only source of caffeine in everyday life. For a caffeine comparison, it is useful to look at the most common beverages side by side:
Black tea (200 ml) provides approx. 40–70 mg
Green tea (200 ml) contains 15–30 mg
A cola (330 ml) contains around 35–40 mg
An energy drink (250 ml) contains approx. 80 mg
In a direct comparison, a cup of filter coffee contains significantly more caffeine than an energy drink. Anyone who really wants to assess their daily caffeine intake should keep all sources in mind; even chocolate and coffee ice cream contain small amounts. Herbal teas such as chamomile or peppermint, as well as rooibos, are completely caffeine-free.
What the caffeine content in your coffee depends on
The caffeine content in your cup is not a fixed value. It varies depending on
- bean type
- brewing method
- dosage
...sometimes significantly. Understanding this allows you to influence your intake in a targeted way without having to give up coffee. In our green coffee assortment, you will find a wide selection of Arabica and Robusta beans that help you control your personal caffeine level.
Berry notes, lively citrus freshness, and subtle floral accents.
Taste of black tea, citrus fruits, jasmine, and apricot
Taste of nuts and spices
Content: 0.8 kg (CHF 22.38 / 1 kg)
Taste of brown sugar, roasted almonds and grapefruit
The most important influencing factors at a glance
Not all factors are equally relevant. Below is an overview sorted by level of influence:
Coffee variety (Arabica vs. Robusta) ➔ High influence. This is the single most important factor. Depending on the variety, the caffeine content of the bean can be almost twice as high.
Brew ratio ➔ High influence. More coffee grounds per amount of water directly means more caffeine in the cup.
Brewing method ➔ Medium influence. Filter, espresso, French press, and cold brew extract different amounts of caffeine from the coffee grounds.
Roast level ➔ Low influence. Caffeine is heat-stable. The amount remains largely unchanged during roasting, regardless of whether the roast is light or dark.
Grind size ➔ Low influence. It affects extraction speed, not the maximum possible caffeine amount in the cup.
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Arabica and Robusta in a caffeine comparison
The biggest difference in caffeine content does not come from the preparation, but from the bean. Arabica contains in general 1.0–1.5% caffeine. Robusta is with 2.0–2.7% significantly higher, about double. So if you want more caffeine in a targeted way, you have the biggest lever in your hands with the choice of beans.
Robusta is often used in espresso blends because it brings more body, a more stable crema and also more caffeine. Within the Arabica species, varieties such as Bourbon, Typica or Caturra also vary slightly in caffeine content, however significantly less strongly than the difference between Arabica and Robusta.
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Why roast level has hardly any influence on caffeine content
One of the most widespread myths about coffee: Dark roasted coffee contains more caffeine because it tastes more intense and "strong." That is not true. Caffeine is a chemically stable compound and remains largely intact during roasting. The roast color is not a reliable indicator of caffeine content.
What actually changes during roasting is the taste: darker profiles develop more roasted aromas, less acidity, and a fuller body. This is often perceived as "stronger." With caffeine content, however, it has very little to do. If you want to pay attention to caffeine when buying beans, you first look at the variety and not at the roast profile.
Conclusion
How much caffeine is in your cup depends mainly on the bean and the preparation method, not on the roast level. If you want to control it deliberately, you should start with the choice of beans: Arabica for less, Robusta for more caffeine. With knowledge of the influencing factors and the daily recommendation, coffee can be enjoyed much more consciously without having to give anything up.
If you are interested in what caffeine does in your body afterwards, how it blocks adenosine, why the afternoon crash happens, and how you can consciously control the timing, you can find all of that in the next article on the effects of caffeine.